Hallucination 1646. [– L. hallucinatio, f. hallucinat-; see prec., -ION.] 1. The condition of being deceived or mistaken, or of entertaining unfounded notions; with a and pl., an illusion 1652. 2.Path. and Psych. The apparent perception of an external object when no such object is present. (Dist. from illusion, as not necessarily involving a false belief.)

Hallucination 1646. [– L. hallucinatio, f. hallucinat-; see prec., -ION.] 1. The condition of being deceived or mistaken, or of entertaining unfounded notions; with a and pl., an illusion 1652. 2.Path. and Psych. The apparent perception of an external object when no such object is present. (Dist. from illusion, as not necessarily involving a false belief.)